CCS 800 Ultro | Installation and Operating Manual
7
Troubleshooting
Temporary no microphone reaction, and no sound or
distorted sound from unit loudspeakers
Possible cause
•
Trunk-line overload.
Solution
•
Reduce load on the trunklines by reducing the
number of units, and/or the length of the trunk
cables.
Acoustic Feedback
Possible cause
•
Loudspeaker volume too loud.
•
Solution
-
Reduce gain using volume control for delegate/
chairman unit loudspeakers on CPSU.
-
If available, switch on Digital Acoustic Feedback
Suppression.
Possible cause
•
Distance between units too small (microphone to
loudspeaker of other units).
•
Solution
-
Increase distance between units.
-
If available, switch on Digital Acoustic Feedback
Suppression.
Possible cause
•
Too close to microphone units, when using open
headphones.
•
Solution
-
Increase the distance between headphone and
microphone or disconnect headphones when not
in use.
-
If available, switch on Digital Acoustic Feedback
Suppression.
Bosch Security Systems | 2003-06 | 3922 988 54284
Part of system not working
Possible cause
•
Interrupted trunk-line cabling.
Solution
•
Check the trunk-line cabling connections between
the units and the CPSU, also use the test function on
the CPSU.
No sound via delegate/chairman loudspeakers
Possible cause
•
Insertion switch in wrong position.
Solution
•
Check if insertion switch at the rear of the CPSU is
in position "1".
Possible cause
•
Volume control position.
Solution
•
Check if the volume control for delegate/chairman
loudspeakers on the CPSU is not in the fully counter
clockwise position.
Possible cause
•
Microphone active or headphone connected.
Note
Units with active microphone or connected
headphone(s) have their loudspeakers switched
off.
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